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tiny-tim
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BruceW said:… is it bad form to use double quotes?
there's no quota on quotiness
(but it is bad form for a quote to quote itself)
BruceW said:… is it bad form to use double quotes?
BruceW said:As long as we are assuming that the 'ray approximation' works, then at a sharp boundary between two materials, Snell's law is always going to work.
BruceW said:... the 'ray approximation' and the Feynman 'sum over paths' are quite analogous, but they are not exactly the same thing. The Feynman 'sum over paths' is an exact quantum calculation, and the 'ray approximation' is an approximate classical calculation.